Police arrested one teenager from a group of five that savagely beat a Pratt Institute student before robbing him in Clinton Hill last Friday.

The horde of hoodlums attacked the 22-year-old architecture major at the corner of Grand and Lexington avenues at 10 pm, clobbering the victim’s head with a crowbar and stealing his wallet and cellphone before leaving him critically injured in the street.

The student, Eduardo Sanchez, remains in a coma in Kings County Hospital.

After police released a surveillance video, an anonymous tip cops led to the arrest of Eugene Adams, 16-year-old and Clinton Hill resident, on Wednesday morning. Police charged him with assault, robbery and possession of stolen property.

Two more suspects have been identified on the video, and cops said they expect them to be in custody.

Police chief Ray Kelly said the motivation for the crime was the robbery. The video shows the suspects using Sanchez’s bank card in an ATM shortly after they bloodied him.

The vicious incident startled the neighborhood, which has seen crime steadily drop for two decades.

But Pratt students still are often targets of muggings, though less violent, by people coveting their cellphones, iPods and laptops.

The brutality of this crime was too much for one Pratt co-ed who said she will move to a neighborhood where she’ll feel safer.